^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) What: /sys/class/tty/console/active
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) Date: Nov 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) Contact: Kay Sievers <kay.sievers@vrfy.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) Shows the list of currently configured
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) console devices, like 'tty1 ttyS0'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) The last entry in the file is the active
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) device connected to /dev/console.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) The file supports poll() to detect virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) console switches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) What: /sys/class/tty/tty0/active
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) Date: Nov 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) Contact: Kay Sievers <kay.sievers@vrfy.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) Shows the currently active virtual console
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) device, like 'tty1'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) The file supports poll() to detect virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) console switches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) What: /sys/class/tty/ttyS0/uartclk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) Date: Sep 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) Contact: Tomas Hlavacek <tmshlvck@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) Shows the current uartclk value associated with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) UART port in serial_core, that is bound to TTY like ttyS0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) uartclk = 16 * baud_base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) What: /sys/class/tty/ttyS0/type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) Shows the current tty type for this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) What: /sys/class/tty/ttyS0/line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) Shows the current tty line number for this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) What: /sys/class/tty/ttyS0/port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) Shows the current tty port I/O address for this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) What: /sys/class/tty/ttyS0/irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) Shows the current primary interrupt for this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) What: /sys/class/tty/ttyS0/flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) Show the tty port status flags for this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) What: /sys/class/tty/ttyS0/xmit_fifo_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) Show the transmit FIFO size for this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) What: /sys/class/tty/ttyS0/close_delay
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) Show the closing delay time for this port in ms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) What: /sys/class/tty/ttyS0/closing_wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) Show the close wait time for this port in ms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) What: /sys/class/tty/ttyS0/custom_divisor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) Show the custom divisor if any that is set on this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) What: /sys/class/tty/ttyS0/io_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) Show the I/O type that is to be used with the iomem base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) What: /sys/class/tty/ttyS0/iomem_base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) The I/O memory base for this port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) What: /sys/class/tty/ttyS0/iomem_reg_shift
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) Date: October 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) Contact: Alan Cox <alan@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) Show the register shift indicating the spacing to be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) for accesses on this iomem address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) These sysfs values expose the TIOCGSERIAL interface via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) sysfs rather than via ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) What: /sys/class/tty/ttyS0/rx_trig_bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) Date: May 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) Contact: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) Shows current RX interrupt trigger bytes or sets the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) user specified value to change it for the FIFO buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) Users can show or set this value regardless of opening the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) serial device file or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) The RX trigger can be set one of four kinds of values for UART
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) serials. When users input a meaning less value to this I/F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) the RX trigger is changed to the nearest lower value for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) device specification. For example, when user sets 7bytes on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 16550A, which has 1/4/8/14 bytes trigger, the RX trigger is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) automatically changed to 4 bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) What: /sys/class/tty/ttyS0/console
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) Date: February 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) Contact: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) Allows user to detach or attach back the given device as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) kernel console. It shows and accepts a boolean variable.
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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